Re: The monsters wakes up ! Katla Hekla Iceland Dead Zone and rift as uniform system ! A lot of others worldwide !

Irpsit says:

March 23, 2013 at 19:47

And I was going to post the following: “It seems Hekla is having an earthquake about every 3 days. Since last earthquake it is about time to see another earthquake, probably happening tomorrow”

And the earthquake just happened!

I think there are major changes precursor to an eruption in Hekla. I think there is a high change of Hekla erupting within the next days. Now I am even more confident that it might erupt.

So today we had a 1.4 deep earthquake, following a major strain event at Hekla.

The sequence of events should be this: - earthquakes like this one, a few of them, starting about 1-2 hours before the eruption - then, a major strain event - then, larger earthquakes and tremor starts (this is 20min before the eruption) - after that, the eruption starts with a major explosion and a ash cloud following it - the ash column last 1 to a few days and then large lava fountains follow for several days to weeks [link to volcanocafe.wordpress.com]

Quoting: Luisport

a lot possible mistakes (which however is quite excusable for amateur observes as in volkanocafe ):

firstly, eqs "like this one" will last a long time (a month - six weeks) at intervals of a day or two, then followed a sharp increase in magnitude and only after that, "1-2 hour " later (more likely 6-8 hours) will eruptive phase.then, " major strain event" and eruptive phase will start simultaneously, tremor before will almost absent (or extremely short time).finally, not necessarily be the beginning of an explosive nature, the first phase may be numerous fissure eruptions of lava and then blasts the main crater and ash emissions

Quoting: Anonymous Coward 36719398

two forecasts about eruption development : will see which one will be closer to the truth

and yet here forecast for time

no, it had not yet begun,all the fun starts after the arrival of warm weather is stable and strong melting

[link to volcans.blogs-de-voyage.fr] Since yesterday, Mount Etna’s SE Crater has been emitting pulses of ash at regular intervals. The eruptive tremor and seismicity are still at relatively low levels but the situation may change rapidly. As Borris Behncke (INGV Catania) put it after the last paroxysm, the “preludes” are getting shorter and the volcano may erupt without warning.

Re: The monsters wakes up ! Katla Hekla Iceland Dead Zone and rift as uniform system ! A lot of others worldwide !

...

a lot possible mistakes (which however is quite excusable for amateur observes as in volkanocafe ):

firstly, eqs "like this one" will last a long time (a month - six weeks) at intervals of a day or two, then followed a sharp increase in magnitude and only after that, "1-2 hour " later (more likely 6-8 hours) will eruptive phase.then, " major strain event" and eruptive phase will start simultaneously, tremor before will almost absent (or extremely short time).finally, not necessarily be the beginning of an explosive nature, the first phase may be numerous fissure eruptions of lava and then blasts the main crater and ash emissions

Quoting: Anonymous Coward 36719398

two forecasts about eruption development : will see which one will be closer to the truth

and yet here forecast for time

no, it had not yet begun,all the fun starts after the arrival of warm weather is stable and strong melting

[link to volcans.blogs-de-voyage.fr] Since yesterday, Mount Etna’s SE Crater has been emitting pulses of ash at regular intervals. The eruptive tremor and seismicity are still at relatively low levels but the situation may change rapidly. As Borris Behncke (INGV Catania) put it after the last paroxysm, the “preludes” are getting shorter and the volcano may erupt without warning.

Re: The monsters wakes up ! Katla Hekla Iceland Dead Zone and rift as uniform system ! A lot of others worldwide !

...

a lot possible mistakes (which however is quite excusable for amateur observes as in volkanocafe ):

firstly, eqs "like this one" will last a long time (a month - six weeks) at intervals of a day or two, then followed a sharp increase in magnitude and only after that, "1-2 hour " later (more likely 6-8 hours) will eruptive phase.then, " major strain event" and eruptive phase will start simultaneously, tremor before will almost absent (or extremely short time).finally, not necessarily be the beginning of an explosive nature, the first phase may be numerous fissure eruptions of lava and then blasts the main crater and ash emissions

Quoting: Anonymous Coward 36719398

two forecasts about eruption development : will see which one will be closer to the truth

and yet here forecast for time

no, it had not yet begun,all the fun starts after the arrival of warm weather is stable and strong melting

Re: The monsters wakes up ! Katla Hekla Iceland Dead Zone and rift as uniform system ! A lot of others worldwide !

[link to www.ingeominas.gov.co] Special Bulletin activity Nevado del Ruiz volcano - Seismic Sense, April 21, 2013, 11:36 a.m.Subject: Special Bulletin sense earthquake Nevado del Ruiz volcano....On April 21, 2013 at 11:36 (local time), there was a volcano-tectonic seismic event associated with rock fracturing within the volcanic edifice, with a 2.9 local magnitude (ML), located to the NW of Arenas crater at a depth of 7.0 km, which was reported as felt by residents near the volcano...

Special Bulletin activity Nevado del Ruiz volcano - Event Sense, April 23, 2013, 1:00 a.m.Subject: Special Event Bulletin sense Nevado del Ruiz volcano. Yellow is maintained activity level or (III): changes in the behavior of volcanic activity...On April 23, 2013 at 01:00 (local time), there was a volcano-tectonic earthquake associated with rock fracturing within the volcanic edifice, with a magnitude of 2.9 local magnitude (ML), located in northwest Arenas crater at a depth of 7.24 km...

A series of seismic events within the volcano El Ruiz shook towns near Bogota over the weekend, as cameras from the Colombian Geological Service (SGC) captured geysers of hot gas and ash. Constant seismic activity in the last three days has experts hyper vigilant. Nevado del Ruiz, a hulking 17,457 ft volcano straddling the border of the Caldas and Tolima departments, is the most observed volcano in the country. El Ruiz took the world stage in 1985 when a tragic eruption destroyed Armero, claiming an estimated 25,000 lives. The largest earthquake, of 4.0 magnitude with a depth of 4.6 miles, was reported by the SGC on Sunday morning. The seismic activity registered since April 13th through yesterday's earthquake has been "associated with fracturing of rock on the interior of the volcanic structure," according to the SGC website. El Ruiz is a stratovolcano, meaning that it is made of alternating layers of lava and hardened volcanic ash. The eruptions from El Ruiz can cause lahars, or flows of mud and debris. The eruption before the lahar which destroyed Armero was relatively small. El Ruiz has been active for an estimated two million years.

Continued recorded seismic activity associated with rock fracturing within the volcanic edifice, with magnitudes less than 2.0 (ML) and mainly located around 6 km to the northwest of Arenas crater, at depths ranging between 6 and 9 km seismic signal volcanic tremor related to fluid dynamics and emission processes and ash has been characterized by a low energy level. Likewise, the emissions of water vapor and sulfur dioxide are still important.

[link to volcans.blogs-de-voyage.fr] Since yesterday, Mount Etna’s SE Crater has been emitting pulses of ash at regular intervals. The eruptive tremor and seismicity are still at relatively low levels but the situation may change rapidly. As Borris Behncke (INGV Catania) put it after the last paroxysm, the “preludes” are getting shorter and the volcano may erupt without warning.

[link to www.flickr.com] Slow playSince its last violent paroxysm on 20 April 2013, Etna's New Southeast Crater has remained in a constant state of mild Strombolian activity. Everybody was initially sure that the next paroxysm would occur rather soon - but it didn't, and this evening, 25 April 2013, the crater is displaying low-level, though rather nice, Strombolian activity for the fifth consecutive day. This is a view taken from my home in Tremestieri Etneo, of one of the numerous small explosions, which also generate puffs of dark ash: impressive to see, but a far cry from the grandeur of a paroxysm : [link to farm9.staticflickr.com]

One can see large ash emissions at the SE Crater this morning. However, it is difficult to know whether another paroxysm is going to take place. It seems the INGV website is not accessible right now.The L.A.V.E. webcam shows that some strombolian activity occurred at 2:30 or so this morning: [link to volcans.blogs-de-voyage.fr]

One can see large ash emissions at the SE Crater this morning. However, it is difficult to know whether another paroxysm is going to take place. It seems the INGV website is not accessible right now.The L.A.V.E. webcam shows that some strombolian activity occurred at 2:30 or so this morning: [link to volcans.blogs-de-voyage.fr]

Re: The monsters wakes up ! Katla Hekla Iceland Dead Zone and rift as uniform system ! A lot of others worldwide !

Renato Rio on April 27, 2013 at 20:14 said:

@Inge B. Locals are reporting fountains up to 500 m and one of the longest events, lasting two hours. @Carl – sigh* means “satisfaction achieved”. BBGN!!!! It was great “paroxysming” together. [link to volcanocafe.wordpress.com]

...19:45: The 13th paroxysm is at its highest with lava fountains and at least one lava flow. A conventional but dramatic event!

20:30: It’s now night on Mount Etna. The paroxysm is going on with a lava fountain and a lava low travelling towards the Valle del Bove.

21:00: The INGV website with the tremor and the seismographs is no longer accessible but it seems the paroxysm has lost some of its intensity. The lava fountains are less powerful. However, the lava flow that travels towards the Valle del Bove is still well fed.

21:30: Even though the lava fountains are still vigorous, the tremor shows that the 13th paroxysm is declining. Like the previous ones, it was quite spectacular despite the start that could not really be seen because of the clouds.

Here is a video of the lava fountains shot by Boris Behncke (INGV Catania)

Re: The monsters wakes up ! Katla Hekla Iceland Dead Zone and rift as uniform system ! A lot of others worldwide !

Irpsit says:

March 23, 2013 at 19:47

And I was going to post the following: “It seems Hekla is having an earthquake about every 3 days. Since last earthquake it is about time to see another earthquake, probably happening tomorrow”

And the earthquake just happened!

I think there are major changes precursor to an eruption in Hekla. I think there is a high change of Hekla erupting within the next days. Now I am even more confident that it might erupt.

So today we had a 1.4 deep earthquake, following a major strain event at Hekla.

The sequence of events should be this: - earthquakes like this one, a few of them, starting about 1-2 hours before the eruption - then, a major strain event - then, larger earthquakes and tremor starts (this is 20min before the eruption) - after that, the eruption starts with a major explosion and a ash cloud following it - the ash column last 1 to a few days and then large lava fountains follow for several days to weeks [link to volcanocafe.wordpress.com]

Quoting: Luisport

a lot possible mistakes (which however is quite excusable for amateur observes as in volkanocafe ):

firstly, eqs "like this one" will last a long time (a month - six weeks) at intervals of a day or two, then followed a sharp increase in magnitude and only after that, "1-2 hour " later (more likely 6-8 hours) will eruptive phase.then, " major strain event" and eruptive phase will start simultaneously, tremor before will almost absent (or extremely short time).finally, not necessarily be the beginning of an explosive nature, the first phase may be numerous fissure eruptions of lava and then blasts the main crater and ash emissions

two forecasts about eruption development : will see which one will be closer to the truth

and yet here forecast for time

no, it had not yet begun,all the fun starts after the arrival of warm weather is stable and strong melting

...19:45: The 13th paroxysm is at its highest with lava fountains and at least one lava flow. A conventional but dramatic event!

20:30: It’s now night on Mount Etna. The paroxysm is going on with a lava fountain and a lava low travelling towards the Valle del Bove.

21:00: The INGV website with the tremor and the seismographs is no longer accessible but it seems the paroxysm has lost some of its intensity. The lava fountains are less powerful. However, the lava flow that travels towards the Valle del Bove is still well fed.

21:30: Even though the lava fountains are still vigorous, the tremor shows that the 13th paroxysm is declining. Like the previous ones, it was quite spectacular despite the start that could not really be seen because of the clouds.

Here is a video of the lava fountains shot by Boris Behncke (INGV Catania)